Container for rectifier tubes



Ncv..15, 1938. G. l.. ussl-:LMAN

A CONTAINER FOR RECTIFIER TUBES Filed June 29, 1935 lllllll.

INVENTOR 6EORGE L USSELMAN BY Q A J ATTORNEY v PetentedNov. 15, 1938 l.UNITED STATES PATENT OFFICE common non morn-mn 'rms Y George HomeyUmmm, noch Point, N. Y., assigner to Radio Corporation of America., a

corporation ol?v Delaware Y i Application .im es, 1935, semi No. 29,021

. 6 Claims.

This 'invention relates to al heat controlled container for enclosingrectifier tubes, particularly rectiiier tubes of theV mercury vaportype. It is an object of this invention to supply 'a 5 container forrectifier tubes in which the temperature is to be controlled withincertain limits.

y cuire that o. certein temperature be maintained for their successfuloperation and, although in genericiA this trouble dici not becometroublesome until the recent ativan, ci remotelydocated radiotrsnsmittingstetions wherein e, complete trousmitter. was enclosedwithin e. suitable building remotely locates from e central operatingplant. As these remotely-located transmitting stations do not contain ocentral heating system, they ere subject to various dem'ees oftemperature changes. Therefore, when rectifier tubes are located in suchbuildings, it is necessary that the temperature be maintained so as not.to fail lower than 59 Fahrenheit, or rise higher than 12il Fahrenheit.

'.lfhev piinoipsl feature of this invention is the locating of therectifier tube 'within a housing i anzi mounting a thermostat near thebase oi the tube, for the reason that it is at this point that thedesired temperature must be maintained, es the tube is critical to vsporpressure I which is determined by the coolest part oi the tube or theplace where the mercury condensa.- tion takes place, which is usually atthe bottom of the tube. The thermostat is provided with a. linkagesystem which operates a. lid or shutter for opening and closing thecasing.` and Iin addition controls a. switch which turns on and of! aheating unit for raising the temperature within the housing.

This invention will be more fully understood byl referring to thevm:coxnpoxni'ing drawing, in which Y l Fig. 1 is a cross-section of cmercury vapor tube container, the tube being shown in elevation; and fFig. 2 is an elevation of Fig. 1.

Referring now in detail to the drawing, the

ticulsrly those of the. mercury vener type, 1re--v (ci. csc- 1) tainer lis left open for the circulation of air 5 when the lid 2 is opened. Therecter tube 5 is mounted in any suitable socket 6 by means of a supportmember l.

A thermostat t is mounted near the base of the tube and is arranged witha link-like melnw ber 9 for opening and Vclosing the shutter or lid E.To the rear of the lid, 2 there is provided Y an extension arm Il! onwhich suitable weights li are hun@ to completely belance the lid so thatonly e. minimum amount oi energy need'be 15 l,supplied for thethermostat for moving the lid l. Directly adjacent thethermostot 8 thereis located' e. heating element it for supplying heat to the containershould the temperature drop below a. certain point. Electrical connec-2o tion is nicole from the heating. unit l 2 to s. switch it which isprovided with contests' i# and lo. These contests are linked to the ermltby ineens ci s. rod-like member it to disconnect the energy supplyingthe heetins unit when. g5 the licl ii is opened.

As mentioned shove, the bottom oi the bon is left open to allow cool oirto enter when the liti opens to allow worm nir to escape. Tnet is, whenthe sir in the bos becomes too Warm, so the'tempereture causes thethermostat to open the lid und to out olf the heater-.Where it is used.

Of course, when the temperature in the bon has cooled, the thermostatcloses the iid and turns on the heat so the temperature in the 35 box isheld within certain limits as determinen by the thermostat setting.

Although only one modicatlon of this invention is shown, lt is to bedistinctly understood that this invention is capable of taking other 4oforms. For instance, `the box or housing may enclose any number oftubes. The usual number may be fromeone to fsix tubes. Also, in warmclimates, the use ci heater l2 may be dispensed with and in its placethe current in the cathode ,415',

may be left on to supply the desired amount of heat to keep therectine'r tubes warm.

Therefore, this invention should not be limited to the modlncatlonshown, except such limitations es are imposed by the appended claims.

I claim: g

1. A- heat controlled container for enclosing a'rectier tube comprisinga box-like heat r-in-.f-

, sulating container, s hinged 11d for said container,

a rectliler tube withlnrnid container-, c mounting lil s thermostatlocated on the side of said container nearthe hase of said rectiilertube, a heating unit located olii` the opposite side of said thermostat,4menuisier regulating the heat within said con tainer by moving anexternal control switch and means for -regulating the heat within saidcon-- lid, and va link member connecting said lid, switch and thermostattogether, said link being actuated by said thermostat to control thetemperature oi' said heating unit.

3. A heat` controlled container for enclosing a rectiiier -tubcomprising a box-like heat insulating container, open at the baseportion and having a hinged lid at the upper portion, a thermostatlocated within said' container, a rectiiler tube within said container,a mounting member secured to one oi the side walls within saidcontainer, a heating unit located near the base of Said rectifier tubeopposite said thermostat,

tainer by moving said lid, and a link member within said container andjoined to said lid and said thermostat, said link being actuated by saidthermostat tocontrol said heating unit.

3. A heat controlled container enclosing a plurality of rectifier tubescomprising a box-like container having a hinged lid, a plurality ofrectiiler tubes within said container, a plurality of mounting memberssecured to one of the side walls within said container, a thermostat anda heating unit located on the inside wall of said container, means forregulating the heat within said container by a link member within saidcontainer and connected to said lid and said thermostat so as'to actuatesaid lid upon a change oi' temperature within said container,

4; A heat controlled container enclosing a rectier tube comprising abox-like container, a rectiiier tube and mounting member within saidcontainena thermostat and heating unit within Y -said container, meansfor regulating the heat within said container, said means comprising a`link member within said container, a switch element outside saidcontainer, a shutter on the top of said container, said link memberconnecting said shutter and said thermostat together so that saidthermostat actuates said shutter, an extension arm located on saidshutter outside said container, and a second link member connected tosaid extension arm and said switch element for actuating the switch tocontrol said heating unit, the shutter and switch being actuatedsimultaneously by said thermostat.

5. A heat controlled container enclosing a rectifler tube comprising abox-like container, a rectiiler tube and mounting member within saidcontainer, a thermostat and heating Aunit within said container, meansfor regulating the heat within said container, said means comprising a.link member located within said container, a switch element outside saidcontainer, a shutter on the top of said container, said link memberconnecting said shutter and said thermostat together so that saidthermostat actuates said shutter outside said container, an extensionarm 1ocated on said shutter and having a weight for balancing saidshutter, a second link member connected outside said container to saidextension arm and said switch element for actuating the switch tocontrol said heating unit, the shutter and switch being actuatedsimultaneously by said thermostat,

6. A heat controlled container enclosing a rectiiler tube comprising abox-like container, a rectifier tube and mounting member within saidcontainer, a thermostat and heating unit within said container, meansfor regulating the heat within said container, said means comprising alink member within said container, a switch element outside saidcontainer, a shutter on the top of said container, said link memberconnecting said shutter and 'said thermostat together so that saidthermostat actuates said shutter, a second link member located outsidesaid container and connected to said shutter and said switch element foractuating the switch to control said heating unit, the shutter andswitch being actuated simultaneously by said thermostat.

GEORGE LINDLEY USSELMAN.

